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 Scooter tune-up? 
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Newb
Newb

Joined: Thu May 04, 2017 7:05 am
Posts: 13
Post Scooter tune-up?
So I just did the throttle mod on my zuma, bumped my speed up to a hair past 35. Now I've read on here that people hit 40mph easy, and i was thinking I could hit that milestone. I know there is a small amount of play in the throttle, but I was wondering if there were any areas where power could be lost, or things I should replace. My scoot has a little over 10k on it


Tue May 16, 2017 7:17 am
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Scooterologist
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Joined: Fri Jul 29, 2016 7:46 am
Posts: 93
Post Re: Scooter tune-up?
When I first got my zuma and did the throttle cam cut, my bike could easily hit 41mph no problem so there is definitely something not right. It could be a few things, at 10k your variator rollers could have flat spots on them, another thing it could be, is under inflated tires, under inflated tires brought my brothers bike from 41 down to 37mph but then again his was an extreme example. Also I recommend removing the carb from the intake and having a look inside to make sure the slide is going all the way up while twisting the throttle. It could also be your belt, remove the case cover and measure the belt width, it should be between 16.6mm(0.65 in) and no less than 14.6mm(0.57 in) per the service manual. While your in there you should take a marker and drawl a line from the bottom to the top of the variator pulley face, then make a full throttle pull and check to make sure the belt is going all of the way up. I hope this helps you some and good luck.

_________________
09 Zuma Black
Athena 15/50 up gears.
Malossi Delta clutch-soft springs-middle spring position-light weights.
S6 19mm PHBG MKll carburetor- polini 86 main-S6 40 pilot-2nd notch up on needle.
Milled case @ oil injection pump for stainless block off plate.
Pre mixed Klotz R50 40:1
E-start delete block off plate stainless.
S6 Enrichment lever and cable.
Piranha quarter turn twist throttle assembly.
Scoot Tuning Single throttle cable conversion.
Malossi carbon reeds .35mm.
S6 Street race mkll 70cc kit .75mm squish.
NGK BR9HS.
Stock air box and filter with snorkel removed.
S6 Pro Replica exhaust.
S6 Sport pro variator-Malossi HAT Rolls 16x13 5g rollers.
S6 black medium contra spring.
Modded vented air shroud painted corsa red with TNT tuning air scoop.
Tun'R bars and stem.
Pro grips 838 grips red.
Scoote Tuning bar end mirrors.
Stage 6 all in one digital speedometer.
BWS tail section with integrated indicators and license plate light.
Custom made side stand
Dual headlight mod
Tun'R tear drop front turn indicators
polished and vented trans cover


Tue May 16, 2017 7:55 pm
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Forum moderator
Forum moderator
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Joined: Thu Mar 20, 2008 5:27 pm
Posts: 14709
Location: portage wi
Post Re: Scooter tune-up?
First question is what carb do you have
Does it have an 80 main jet or a 76
If it has a 76 you are running the shitter epa carb and that is your issue

If it's and 80 then you need to check the whole thing over
Belt how old is it if it's over 2 years old don't even bother measuring throw in stout and replace intstboutt with oem if intstboutt not an Oem yamaha belt same thing throw that stool out
Tires againg they are rubber and e to 5 years is the life span read the date code
Check your pressures
Make sure the trans isn't too full drain intstboutt stout and fill it with no me then a half cup it calls for 110 cc a half cup is 118

Next question is size if you are larger I would say in the 275 and up range that will hurt the scoots performance

_________________
2008 zuma dual headlight mod koso mirrors liquid cooled polini corsa kit leo vince zx stage 6 variator rally kit custom red paintFUEL INJECTEDsoon to be 100cc
2008 stella olive custom ported 177 cc kit dechromed ford tear drop tail light alive and breathing and awaiting cosmtic surgery thanks to an donkey hind quater hole cager
1985 elite 150 how long can i leave it stock


Wed May 17, 2017 3:45 pm
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Newb
Newb

Joined: Thu May 04, 2017 7:05 am
Posts: 13
Post Re: Scooter tune-up?
I got the stock carb, and how do i tell what jet size I have?


Fri May 19, 2017 7:24 am
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Scooterologist
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Joined: Fri Jul 29, 2016 7:46 am
Posts: 93
Post Re: Scooter tune-up?
Remove the carb, then remove the float bowl by removing the two mounting screws. The main jet will be the large round jet dead center of the float, the pilot jet will be the small jet right under that. The jet size will be stamped on the side of the jet.

_________________
09 Zuma Black
Athena 15/50 up gears.
Malossi Delta clutch-soft springs-middle spring position-light weights.
S6 19mm PHBG MKll carburetor- polini 86 main-S6 40 pilot-2nd notch up on needle.
Milled case @ oil injection pump for stainless block off plate.
Pre mixed Klotz R50 40:1
E-start delete block off plate stainless.
S6 Enrichment lever and cable.
Piranha quarter turn twist throttle assembly.
Scoot Tuning Single throttle cable conversion.
Malossi carbon reeds .35mm.
S6 Street race mkll 70cc kit .75mm squish.
NGK BR9HS.
Stock air box and filter with snorkel removed.
S6 Pro Replica exhaust.
S6 Sport pro variator-Malossi HAT Rolls 16x13 5g rollers.
S6 black medium contra spring.
Modded vented air shroud painted corsa red with TNT tuning air scoop.
Tun'R bars and stem.
Pro grips 838 grips red.
Scoote Tuning bar end mirrors.
Stage 6 all in one digital speedometer.
BWS tail section with integrated indicators and license plate light.
Custom made side stand
Dual headlight mod
Tun'R tear drop front turn indicators
polished and vented trans cover


Fri May 19, 2017 7:47 am
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